Abstract: In a cable modem network, upstream bandwidth is allocated to service flows by receiving requests from modems, wherein each request identifies an amount of requested bandwidth for a corresponding requesting service flow; determining how much best-effort bandwidth to allocate for each requesting service flow; determining how much remaining bandwidth is available after taking into account all of the best-effort bandwidth for the requesting service flows; determining how much of the remaining bandwidth to allocate as proactive grant service (PGS) upstream bandwidth to PGS service flows; determining, for each requesting service flow, a summed bandwidth as a sum of any corresponding best-effort bandwidth and any corresponding PGS bandwidth; determining, for each requesting service flow, an amount of allocated bandwidth as a minimum of the summed bandwidth and a maximum allowable bandwidth; and transmitting grants to the modems identifying the amounts of allocated upstream bandwidth for the corresponding service flo

Abstract: A plurality of cable modems (CMs) serviced by a cable management termination system (CMTS) are identified, each of the CMs being associated with a particular bandwidth service tier of a plurality of bandwidth service tiers. The plurality of CMs are grouped into a quantity of groups of CMs based on the bandwidth service tier with which each CM is associated. A CM orthogonal frequency division multiplexing (OFDM) profile is generated for each respective CM in each group of CMs. A plurality of group OFDM profiles are generated. Each respective group OFDM profile is generated based on the CM OFDM profiles of the CMs in a respective group of CMs and, for each subcarrier of a plurality of subcarriers, a quadrature amplitude modulation (QAM) order is identified.

Abstract: A risk assessment and control method for radial cracking and crack propagation and transfixion of cement sheath in fracturing wells is provided. Based on the thermo-solid coupling theoretical model of casing-cement sheath-formation combination and thick-walled cylinder theory, the tangential stress distribution of crack-free cement sheath when fracturing is obtained, the maximum tensile stress criterion is used to judge whether the cement sheath has radial initial cracking when fracturing and calculate the initial cracking length, based on the weight function method, the stress intensity factor of the tip of the radial initial cracking of the cement sheath when fracturing is calculated, the fracture mechanics criterion is used to judge whether the radial crack propagation and transfixion will occur in the cement sheath, and the performance parameters of the cement sheath are controlled by the double standards of preventing the radial cracking of the cement sheath and controlling the crack propagation.

Abstract: In a cable modem network, upstream bandwidth is allocated to service flows by receiving requests from modems, wherein each request identifies an amount of requested bandwidth for a corresponding requesting service flow; determining how much best-effort bandwidth to allocate for each requesting service flow; determining how much remaining bandwidth is available after taking into account all of the best-effort bandwidth for the requesting service flows; determining how much of the remaining bandwidth to allocate as proactive grant service (PGS) upstream bandwidth to PGS service flows; determining, for each requesting service flow, a summed bandwidth as a sum of any corresponding best-effort bandwidth and any corresponding PGS bandwidth; determining, for each requesting service flow, an amount of allocated bandwidth as a minimum of the summed bandwidth and a maximum allowable bandwidth; and transmitting grants to the modems identifying the amounts of allocated upstream bandwidth for the corresponding service flo

Abstract: An Influx Management Envelopes (IME) for MPD through a cloud-based solution is generated, simplifying the process for routine application in drilling operations and providing parallel computing to enhance the efficiency of IME generation by parameterizing various influx scenarios. Utilizing a transient multiphase flow engine, the study establishes kick tolerance thresholds for safe influx volume determination. The analysis includes assessing associated risks during kick circulation using MPD system. Parallel computing facilitates faster computations and improved scalability. The combined approach integrates simulation results into an operational envelope for safer decision-making. The IME may be determined considering company well control policies, for adherence to established guidelines and maintain a consistent and standardized approach to well control practices. Collaborative workflows facilitate seamless teamwork, communication, and coordination.

Abstract: Disclosed are chemically end-capped polypiperazine pyrophosphate-modified ammonium polyphosphate with high temperature resistance and precipitation resistance, a preparation method therefor, and an apparatus and application thereof. The chemically end-capped polypiperazine pyrophosphate-modified ammonium polyphosphate flame retardant is formed by polypiperazine pyrophosphate modification based on ammonium polyphosphate, followed by end capping; and the polypiperazine pyrophosphate is prepared by polymerization of an intermediate piperazine diphosphate obtained through dehydration condensation of phosphoric acid and piperazine. The chemically end-capped polypiperazine pyrophosphate-modified ammonium polyphosphate flame retardant of the present solution is prepared by using special equipment, which ensures whiteness and thermal stability of product, and improves properties of ammonium polyphosphate.

Abstract: The present invention discloses an air-bearing and a centrifugal refrigeration compressor, wherein the air-bearing comprises two sets of first notch grooves, which are symmetrically arranged at two ends of a rotor, each set of first notch groove includes several radial grooves distributed circumferentially around the rotor, and the radial grooves are curved to form an air film to support the rotor when it rotates. By applying the air-bearing in centrifugal refrigeration compressors, on the one hand, a smaller size rotor can be used in the centrifugal refrigeration compressors, thereby achieve the requirements of smaller size and higher speed of the centrifugal refrigeration compressors, and on the other hand, it is able to reduce the air film gap, reduce the co-frequency and sub-synchronization amplitudes of the rotor, reduce the risk of the impeller rubbing against the shell and meet the demand for a smaller tip clearances.

Abstract: Disclosed is an electronic device, including a housing, a light-emitting component, a first light-distributing component, and a second light-distributing component. The housing is provided with an inner cavity and a light exit hole communicating with the inner cavity, the light-emitting component and the first light-distributing component are disposed in the inner cavity, the second light-distributing component is located in the housing, and at least part of the second light-distributing component is mounted in the light exit hole. The light-emitting component and the light exit hole are staggered. The first light-distributing component is configured to receive and adjust light emitted by the light-emitting component, causing the light to be transmitted towards a side where the light exit hole is located before being projected onto a second light entrance surface of the second light-distributing component. The second light-distributing component is configured to receive the light.

Abstract: An abnormality diagnosis device includes: a first interface to obtain a value of a driving current for driving a motor; and a processor to access a database including calculation data to be used to calculate a degree of abnormality of the motor, wherein the processor extracts a feature quantity for calculating the degree of abnormality from a current waveform specified by a value of the driving current, and calculates the degree of abnormality of the motor based on the extracted feature quantity and the calculation data.

Abstract: Methods and apparatus reduce defects in substrates processed in a physical vapor (PVD) chamber. In some embodiments, a method for cleaning a process kit disposed in an inner volume of a process chamber includes positioning a non-sputtering shutter disk on a substrate support of the PVD chamber; energizing an oxygen-containing cleaning gas disposed in the inner volume of the PVD chamber to create a plasma reactive with carbon-based materials; and heating the process kit having a carbon-based material adhered thereto while exposed to the plasma to remove at least a portion of the carbon-based material adhered to the process kit.

Abstract: A part inspection system is provided and includes a vision device configured to image a part is inspected and generate a digital image of the part. The part inspection system includes a part inspection module coupled to the vision device and receiving the digital image of the part. The part inspection module includes a memory for storing a neural network architecture having a plurality of convolutional layers, a plurality of pooling layers disposed after different convolutional layers and spaced apart from each other, at least one random noise generation layer downstream of the convolutional layers and the pooling layers, and an output layer. The part inspection module includes a processor configured to analyze the digital image through the layers of the neural network architecture to output one of a defective output or a non-defective output based on the image analysis of the digital image through the neural network architecture.

Abstract: Systems, apparatuses, and methods are described for deploying upstream bandwidth upgrade of devices per home basis. The impact of the upstream bandwidth upgrade on the devices may be pre-estimated based on remotely monitoring and/or analyzing performance data of the devices collected during transmissions of test signals (e.g., a burst of upstream transmissions) in real-time from the devices operating under different modes of operations. The burst of upstream transmissions using a small bandwidth (e.g., 1.6 MHz) may be limited to a short duration of time (e.g., 5 seconds) so that on-going services provided by the devices are not substantially interrupted. The upstream bandwidth of the devices, based on the pre-estimated impact, may be upgraded, left unaltered, or downgraded.

Abstract: Disclosed are a data transmission method and apparatus, which are used for realizing low-delay and high-reliability transmission of data in a new radio (NR) system.

Abstract: Disclosed are chemically end-capped melamine pyrophosphate with high temperature resistance and precipitation resistance, a preparation method and apparatus thereof, and an application thereof in flame-retardant nylon. End-capping treatment of melamine pyrophosphate enhances flame retardancy and precipitation resistance of a flame retardant, and melamine pyrophosphate is used for producing high-strength flame-retardant nylon, which improves product performance. A special flame-retardant preparation device is also used, and appropriate process flow and parameter design further improves comprehensive properties of the flame retardant, including whiteness and a 1% thermal decomposition temperature. The present technical solution can overcome technical defects of the melamine pyrophosphate flame retardant in the prior art including non-ideal properties in a flame retardant effect and stability, as well as difficulty to improve the comprehensive properties of the flame-retardant nylon.

Abstract: Embodiments of this application provide an audio processing method and system, and an electronic device. The method includes: in response to a play operation of a user, performing spatial audio processing on an initial audio clip in a source audio signal to obtain an initial binaural signal, and playing the initial binaural signal; receiving a setting of the user for a rendering effect option, where the rendering effect option includes at least one of the following: a sound image position option, a distance perception option, or a spatial perception option; and performing spatial audio processing on an audio clip subsequent to the initial audio clip in the source audio signal based on the setting, to obtain a target binaural signal.

Abstract: An ammonia-rich combustion coupled dual-mode prechamber ammonia-fueled engine control system is provided, including an ammonia-fueled engine and an electronic control unit. The ammonia-fueled engine includes a combustion chamber, a dual-mode jet ignition device, and an ammonia injector. The dual-mode jet ignition device includes a prechamber, an air injector, and a fuel injector. When the engine operates, ammonia fuel is firstly injected into the combustion chamber by the ammonia injector to form a rich ammonia-air mixture with air in the combustion chamber. During a compression stroke of the engine, the rich ammonia-air mixture in the combustion chamber is entered into the prechamber through a jet hole. The air injector performs scavenging in the prechamber until a equivalence ratio of prechamber gas mixture is less than 1.0, and then the fuel injector injects fuel into the prechamber forming target mixture. Finally, the target mixture is ignited by the spark plug.

Abstract: A precombustion chamber igniter with a retractable electric glow plug and a cold start control method for a methanol engine are provided. The precombustion chamber igniter includes a fuel injector, a spark plug, and an electric glow plug. The electric glow plug is retractable and has two working positions, at a first position, a heating segment is wholly located in an injection chamber to provide heat energy for the injection chamber, and at a second position, the heating segment is partially located in the injection chamber and passes through a first through hole, and the rest of the heating segment is located in a main combustion chamber of an engine, to provide heat energy for the injection chamber and the main combustion chamber. In a cold start stage of the engine, the heating segment of the electric glow plug is controlled to be located at the second position.

Abstract: A manifold assembly includes a liquid inlet pipe, a plurality of transparent windows and a liquid return pipe. The liquid inlet pipe has a first accommodating space, a first liquid inlet, a plurality of first liquid outlets and a plurality of openings. The first accommodating space is configured to accommodate a cooling liquid, and is in fluid communication with the first liquid inlet, the first liquid outlets and the openings. The transparent windows cover the openings. The cooling liquid is visible from outside via the transparent windows. The liquid return pipe has a second accommodating space, a plurality of second liquid inlets and a second liquid outlet. The second accommodating space is configured to accommodate a cooling liquid, and is in fluid communication with the second liquid inlets and the second liquid outlet.

Abstract: An energy storage device and a control system for an energy storage device are provided. The energy storage device includes a case, a battery module, and at least one connecting piece. An accommodating cavity is defined in the case. At least one opening is formed on a side surface of the box body. The battery module is arranged in the accommodating cavity. The connecting piece is connected between a side surface of the battery module, for example, adjacent to the opening and the box body.

Abstract: An energy storage device includes: a box body that includes two end portions in a left-right direction including openings; a first end cover assembly and a second end cover assembly respectively disposed on the two end portions of and detachably connected to the box body, to define an accommodating cavity; a battery management system in the box body and a battery module in the accommodating cavity. The battery management system and the battery module are disposed in an up-down direction. At least two battery core groups are disposed in the up-down direction. A plurality of battery cores is disposed side by side in a front-rear direction, and each battery core extends in the left-right direction. The battery module and the battery management system are removable from the accommodating cavity through the openings.